Prohibition of Sealants: Fittings such as ferrule-type and flared-type connectors rely on metal-to-metal contact or O-rings for sealing; applying sealants may cause particles to enter the system, potentially clogging the throttle orifices or spools of hydraulic components.
Single-Pass Installation: Avoid repeated disassembly, as this causes wear to the sealing surfaces and compromises sealing reliability.
Strict Tube End Preparation: After cutting, the tube ends must be ground smooth, deburred, and thoroughly purged of internal contaminants using high-pressure air; the use of flame cutting or abrasive wheel cutting is strictly prohibited.
Maintain Coaxial Alignment: During pre-assembly, ensure that the tube and the fitting body are coaxial; excessive misalignment will lead to seal failure.
Control Tightening Torque: Tighten fittings to the specified standard torque values (e.g., 64–115 N·m for a Φ6mm ferrule fitting, or 450 N·m for a Φ18mm fitting); overtightening can easily damage the ferrule or the threads.
Avoid Lateral Forces and Tension: Once installed, the tubing must not be subjected to additional bending moments or axial tensile loads; appropriate allowance for potential deformation should be provided.
